(57) Process and apparatus for monitoring and/or controlling at least one air conditioning
and/or heating plant (1) comprising at least one delivery line (3), at least one return
line (4) and a predetermined number of service lines (5) hydraulically interposed
between the delivery line (3) and the return line (4), each service line (5) comprising
at least one thermal exchange unit (7). The process and apparatus are designed for
detecting the value (ϕ) of the flow rate of the carrier fluid traversing the thermal
exchange unit (7), and for determining at least one value of the temperature difference
(ΔT) between the temperature (Tt1) of the carrier fluid, at the first section (5a), detected at a first instant (t1),
and the temperature (Tt2) of the carrier fluid, at the second section (5b), detected at a second instant (t2),
wherein the second instant is subsequent to the first instant (t1) by said hydraulic
delay (dt). Based on the above values the process and apparatus determine a characteristic
function which relates said temperature difference (ΔT) between the first and the
second section to said value of the carrier fluid flow rate (ϕ), or a characteristic
function which relates a thermal power exchanged (dQ/dt) by the thermal exchange unit
to said value of the carrier fluid flow rate (ϕ). Moreover, or alternatively, the
process and apparatus use the above values to control the thermal power exchanged
by the exchange unit.
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